var newwindow;
function form(url) 
{
var left = (screen.width/2)-(580/2);
var top = 20;
newwindow=window.open(url,'ad','height=600,width=600,left='+left+',top='+top+',resizable=no,scrollbars=yes,toolbar=no,status=no,location=no');
if (window.focus) {newwindow.focus()}
}
function arztkp(url) 
{
var left = (screen.width/2)-(790/2);
var top = 20;
newwindow=window.open(url,'ad','height=600,width=790,left='+left+',top='+top+',resizable=no,scrollbars=yes,toolbar=no,status=no,location=no');
if (window.focus) {newwindow.focus()}
}